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If you want to measure humidity (and temperature, and maybe even barometric ... The eBay hacker favorite, the so-called DHT22 module, doesn’t fare all that well, with one of six that [Robert ...
It comes with a built-in DHT22/AM2302 temperature and humidity sensor and has slots for a mini OLED display, waterproof DS18B20 temperature sensor, and empty slots for up to three additional I2C ...